Ink-jet printing ink binder, print and ink-jet printing ink containing the same

摘要

The object of the present invention, without impairing the good ejection stability of the ink, to provide a formable ink jet printing ink binder for printing images with the alcohol resistance and excellent scratch resistance was very good is. Isocyanate group of the (a1) of the polyisocyanate and [X] hydroxyl groups possessed by the (a2) the polyol and [Y] equivalent ratio invention, [, polyols including polyether polyols and specific polyisocyanate (a2) polyurethane having a hydroxyl group at the molecular end of 30,000 70,000 weight-average molecular weight obtained by reacting a range of [Y]] is from 0.930 to 0.995 isocyanate group [X] / hydroxyl group (A) , as well as hydroxyl group which contains an aqueous medium (B), present at a molecular terminal of the polyurethane (A) is for a jet printing ink binder is a hydroxyl group of the polyether polyol derived.